need replacement pump diaphragm for power hacksaw

[Inflight]

I have an old power hacksaw from the 1940's that uses a simple diaphragm pump to circulate cutting oil on the return stoke. Can someone tell me where I can find replacement rubber diaphragm kits? It's a little larger than 3" OD and has six holes and a .25" plunger stud 2" long. I will be pumping sulphurized cutting oil (brown stuff). Otherwise I'll make my own using an older inner tube or something.




Thanks for the assistance!
Matt

 

[Hawkeye]

The oil will eat an inner tube in short order. You'll need neoprene or some plastic rated for oil.

 

[Inflight]

The oil will eat an inner tube in short order...

Thanks Hawkeye, I kind of figured that but wasn't sure.

I see mcmaster has neoprene sheet available but seems rather expensive. I thought pump diaphragms where a common maintenance replacement item. I've checked grainger, ebay, msc, enco and a few others. I must be searching with the wrong criteria.

 

[PIKEMAN]

find a auto parts store with old inventory. There are a lot of old fuel pumps that use a diaphragm such as yours.
Northwestern auto parts in grand rapids,MI comes to mind. Maybe Check Hemmings Motor news.
Also, a lot of marine engines use the rebuildable fuel pumps that use that diaphragm-try a marina.

 

[itsme_Bernie]

find a auto parts store with old inventory. There are a lot of old fuel pumps that use a diaphragm such as yours.
Northwestern auto parts in grand rapids,MI comes to mind. Maybe Check Hemmings Motor news.
Also, a lot of marine engines use the rebuildable fuel pumps that use that diaphragm-try a marina.

+1



Bernie

 

[DMS]

I'm not sure how thick it needs to be, or what stuff you are looking at on McMaster, but this doesn't seem too expensive

http://www.mcmaster.com/#9013k81/=orpnh5

That is the 1/16" stuff in 6x6" squares and it's only $5.22. The larger pieces are more expensive, but less per square inch.

 

[Tonym47]

I repaired a diaphragm at work with a piece cut from a heavy polly bag.I put one on each side and bolted it up .It lasted 4 years